Dropbear SSH Server before 2013.59 generates error messages for a failed logon attempt with different time delays depending on whether the user account exists, which allows remote attackers to discover valid usernames.
Unitrends assessment: NOT EXPOSED
The dropbear ssh server is not the same as the openssh-server package. Our CentOS installations use the openssh-server package instead.
Fixed in dropbear-2013.59-1.el6 package from the Fedora EPEL repository.